/Engine/Plugins/Experimental/QuicMessaging/Source/QuicMessagingTransport/Public/QuicEndpointManager.h
De-register lost endpoint node.
void EndpointNodeLost ( const [FGuid](API\Runtime\Core\Misc\FGuid) NodeId, const [FIPv4Endpoint](API\Runtime\Networking\Interfaces\IPv4\FIPv4Endpoint) LostEndpoint )